Continuous circulating pump



Y y 1931- c. F. DAVIS 1,807,392

CONTINUOUS CIRCULATING PUMP Filed May 28. 1929 2 Sheets-Sheet l m JiHTTEIRNEY May 26, 1931.

C. F. DAVIS CONTINUOUS CIRCULATING PUMP Filed May 28, 1929 2Sheets-Sheet INVENTDR OFDav/Zs JVZZ HTTEIRNE Patented May 1931 UNI ED srAT-es GLAUD name DAVIS, or snnnysinn, onro I con rmnons cmonnn'rme rnmrApplication filed May 28,

, This invention relates to pumps, and more specifically to a continuouscirculating pump of the type used in connection with electricrefrigeration apparatus.

The primary object of the invention is to provide a pump of thecharacter mentioned which possesses a minimum of moving parts and which,consequently, can be economically manufactured. I

A further object of the invention is to provide a pum in which vibrationduring operation is efiectually eliminated, thereby re ducing noise teaminimum.

further object of the invention is to'pror5 vide a pump in which theparts are at all times in substantially perfect balance.

With these and other objects in view, the s is provided andpreferably.carried by the adinventionresides in the features of construction,arrangement of parts, and combiga nations of elements which willhereinafter be fully described, reference being had to the accompanyingdrawings, in which I Figure l is a longitudinal sectionalview of theinvention; v

Figure 2 is a section on, line 2-2, Fig. 1'; Figure 3 is a sideelevation (if one of the slidingnheads' of the rotor;. Figures t and 5are sections on lines 4- 1 and 5-5,;respectively, of Fig. 3.

re 6 is a view similar to Fig. 1 showing a modified form of theinvention;

Figure 7 is a section on line 77, F i 6; Figure 8 is a side elevation ofone o the sliding ends of the rotor and a Figures 9 and 10 are sectionson lines 99 and 10-10, Fig. 8. Referring to said drawings, the referencenumeral 1 designates a casing having a pumping chamber formed with anelliptical'inner casing 1 is stationary while a rotor 3 of circular formin cross section is rotatable in the chamber. The rotor has oppositeaxially disposed journals tand 4 which rotate in the end walls of thecasing 1, said journal 4* be'ng lextended outwardly and being adapted orconnection with adrive shaftthrouglr which power is communicated fordriving said ro tor. The journal 4, as also theinner end circumferentialwall 2. In the form of the 1929. SerialNo. 366,610. a

portion of the journal 4*, is made hollow, as shown. A pair of spacedparallel bores or V passages 5 and Gdiametrically' extend across therotor, the.bore 5-communicating with the interior of the journal 4 andthe bore 6 communicating with the interior of the hollow journal 1.Tubular members 7 which are slidably disposed in the opposite ends ofeach of the bores or .passages 5 and 6 are rigidly carriedfby a head 8,the latter being rotatable with the rotor and. being centrifugally heldin seated relation to the walls of the casing 1. Ports 9 and 10. areformed on opposite sides, of each head and communicate with the bores 5and 6,frespectively, through the interiors of the tubular members 7.

As shown in Fig; '1, an inlet reservoir 11 jacent end of the pumpcasing. This reservoir has an inlet 12 formed for connection with thesource of supply and surrounds the outer end wall of the journal 4:- Areservoir 15 is secured to the opposite end wall of' the pump vcasingand has an exhaust opening 16 thereinfor conveying the fluid to thepoint of use through any suitable. connection (not shown) j a In orderto reduce the friction between the heads and the circumferential wall ofthe pump casing, the heads are provided with anti-friction rollers 17which are journaled on the outer surfaces of the heads. The bores orpassages 5 and .6 open at their outer ends into transverse channels 18provided in the periphery of therotor and in which the heads 8 areslidable radially. The tubular members 7 or some of them, have ports 19therein designed to prevent the formation of vacuum in the channel 18. 5

In the modified form of the invention shown in Figs. .6 to 10,inclusive,the member is stationarily mounted on supports 21 and has itshollow ournals 23 and 24 rigidly secured to the supports by means of setscrews 25. -The casing 26 encircles the member. 27 and is driven by abelt28, shown in dotted lines, said belt being engaged over theperiphery of the casing.

In this form of the invention the heads 29 areconnected to tubularmembers 30 and 31,

said members being tensioned by means of coil springs 32, the coilsprings being disposed in the bores 33 and at their ends engage thetubular members to normally urge same outwardly thereby to hold theheads 29 in engagement with the elliptical wall of the casing 26. Theheads 29 are provided with ports 35, similar to those described in thepreferred form of the invention.

In the operation, which is similar in each of the two forms of theinvention herein shown, the fluid to be forced by the pump enters thereservoir 11 by gravity, thence passes through the interior of thejournal 4, thence in opposite directions through the passage 5 anddischarges through the ports of the opposite heads 8 into the pumpchamher at the side of the said heads opposite that toward which saidheads are being carried in the rotation of the rotor. At the same time,fluid contained by the pump chamber in front of the advancing headsenters the ports 9 and passes thence to the therewith-communicatingtubular members 7, thence through the passage 6, thence through thehollow journal 4 to and through ports 14 formed in said journal, whencethe fluid entors the outlet reservoir 15, and thence passes to the pointof use through the outlet opening 1. In a pump, a casing havingan'elliptical circumferential wall, a cylindrical rotor in said casinghaving oppositely disposed hollow journals rotatably mounted centrally1n the side wall of said casin g and having spaced diametrical boresopening at opposite ends into the interior of said casing andcommunicating intermediate their ends with the respective journalinteriors, tubular members slidably mounted in the opposite ends of saidbores, centrifugally-res onsive heads carried 'by the ad acent tn ularmembers and occupyin 'seatedrelation to the circumferin the casinghaving oppositely disposed hollow journals rotatably mounted in the sidewalls of said casing, said rotor having therein spaced diametrical boreshaving their opposite ends opening into the interior of the casing, theinterior of each journal being in open communication at its inner endwith the adjacent bore, centrifugally-responsive members havingtheirinnerends slidably received in the outer ends of each bore, saidmembers having their outer ends seated upon the circumferential wall ofthe casing and having ports opening outwardly in opposite directionsthrough which communication is had between said bores and the interiorof the casing at both the front and rear sides of said members. W

3. In a pump of the character described, a casing having an ellipticalwall, a cylindrical rotor disposed centrally within said casing, axiallydisposed journals for said rotor rotatably mounted in the opposite sidewalls of the casing, said rotor having a pair of diametrically disposedvnon-communicating passages extending therethrough, the journals havingtherein axial bores which communicate at their inner ends, respectively,with the thereto adjacent passages, one of said bores constituting afluid inlet and the other a fluid outlet passage,centrifugallyaesponsive heads occupying seated relation to thecircumferential-wall of the casing and having radially directed portionsslidably disposed with respect to the adjacent end portions of saiddiametrically disposed passages, each ofsaid heads having therein portsopening outwardly therethrough in opposite directions, said ports havingcommunication through their said radially directed portions with thesaid diametrically disposed assages of the rotor.

In testimony whereo I aflix my si nature.

CLAUD FLEMING D VIS.

ential wa l of the casing, said heads having ports opening outwardly inopposite directions in communication with respective tubular members,reservoirs having communicajournal.

2. In a pump, acasing having an elliptical circumferential wall, acylindrical rotor with-

